un·​treat·​ed | \ ˌən-ˈtrē-təd How to pronounce untreated (audio) \

Definition of untreated

: not treated untreated wastewater especially : not improved or controlled medically an untreated case of pneumonia untreated diabetic patients

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Examples of untreated in a Sentence

Recent Examples on the Web Left untreated, both can lead to permanent hearing loss. Popular Science, "We combined the most dangerous parts of every sport—this is the result," 14 Sep. 2020 Left untreated, myocarditis can damage the heart and lead to heart attacks and arrhythmias, among other complications. Melody Schreiber, The New Republic, "What Is Covid-19 Doing to Our Hearts?," 11 Sep. 2020 And in June, psychiatrist James Lake warned of such a second wave in Psychiatric Times and anticipated that, left untreated, the psychological effects of the Covid-19 pandemic could have serious consequences for years to come. Grace Huckins, Wired, "Mental Health in the US is Suffering—Will It Go Back to Normal?," 8 Sep. 2020 Left untreated, however, prostate cancer can spread to distant organs, such as the lungs, liver or bones, which reduces the five-year survival rate to only 31 percent. Beth Mlady, cleveland, "Brook Park observes Prostate Cancer Awareness month," 4 Sep. 2020 The report also urges quantifying how much water users are conserving and requiring meters on secondary water, the untreated water many northern Utah residents use on landscaping with almost no restriction. Brian Maffly, The Salt Lake Tribune, "Great Salt Lake can be saved, but only with some big changes, report says," 26 Aug. 2020 Those actions, according to the news release, will prevent any sort of release of untreated water into the Menominee River. Laura Schulte, Milwaukee Journal Sentinel, "DNR seeking to lower levels of arsenic, PFAS flowing into Menominee River from firefighting foam facility in Marinette," 18 Aug. 2020 Graywater is defined in the legislation as untreated water generated by the use of and collected from a shower, bathtub or lavatory sink. Mary Grace Keller, baltimoresun.com/maryland/carroll, "Idea of charter government is revived, with 2 Carroll County commissioners arguing in favor but no vote held," 12 Aug. 2020 Minimize cross-contamination by storing dirty and clean parts separately and washing or sanitizing your hands after touching untreated water. Adrienne Donica, Popular Mechanics, "The Best Backpacking Water Filters, Tested," 23 July 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'untreated.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of untreated

15th century, in the meaning defined above

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Time Traveler for untreated

Time Traveler

The first known use of untreated was in the 15th century

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Statistics for untreated

Last Updated

18 Sep 2020

Cite this Entry

“Untreated.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/untreated. Accessed 26 Sep. 2020.

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More Definitions for untreated


How to pronounce untreated (audio)

English Language Learners Definition of untreated

: not getting medical care : without medical treatment
: not made better or safer by being treated with a chemical or other substance


un·​treat·​ed | \ -ˈtrēt-əd How to pronounce untreated (audio) \

Medical Definition of untreated

: not subjected to treatment an untreated disease

More from Merriam-Webster on untreated

Thesaurus: All synonyms and antonyms for untreated

Nglish: Translation of untreated for Spanish Speakers

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